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DescriptionReleases of petroleum contaminants from a retail gasoline station in a medium-sized California Central Valley town threatened a municipal supply well immediately adjacent and approximately 200 ft downgradient to the station. Methyl tert-butyl ether (MTBE) was present in groundwater concentrations up to 30,000 micrograms per liter (µg/L) and GRO up to 33,000 µg/L in the first-encountered groundwater aquifer, between 30 to 45 feet below ground surface (BGS). The concern was that the MTBE...

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Initially an SVE/bioventing system was operated for 16 months, removing over 20,800 pounds of gasoline, leaving groundwater concentrations of TPHg and benzene of 60 and 0.37 ppb, respectively. The highest MTBE concentration in September 2001 was 5,400 ppb at a monitoring well just downgradient of the former USTs, with a total estimated area above 500 ppb of over 12,000 square feet. Approximately 5.5 million gallons of groundwater were impacted. A KTI (formerly KVA) C-Sparge™ in situ chemical...

As China’s economy has grown over the past decade at a breakneck pace it has struggled to match the increasing demand for fuel for cars that its people are buying in ever greater numbers. In an effort to solve this problem the Chinese looked for an alternative liquid fuel source and settled on methanol. In less than a decade China’s methanol use in the transportation sector has grown from virtually zero to providing 8% of the country’s fuel supply, and reducing the demand of gasoline by a fairly...

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